Boring device



June 18, 1940. D. T. BEARDSLEY BORING mmcn Filed Jan. 12. 1938 2 Sheets-Sheet 1 INVENTOR. DDLWARD T. 'BEARDSLEY June 18, 1940.

- D. T. B EARDSLEY 2,205,237

' BORING DEVICE Filed Ja n. 12, 1938 2 Sheets-Sheet 2 INVENTOR. Dmwmzu T- BEARDSLEY ATTORNEY.-

Patented June 18, 1940 UNITED STATES PATENT OFFICE BORING DEVICE Dilward T. Beardsley, Wichita, Kans., assignor of acne-half to Earl W. Couchman, Wichita, Kans.

Application January 12, 1938, Serial No. 184,631

3 Claims. (01. 77-2) This invention relates in general to a boring described wherein means are provided for interdevice and particularly to a taper hole boring mittently progressing the cutting tool along a appliance, portable in construction and adapted tapered guide. v to enlarge or taper cut a hole at any desired And lastly, to provide in a boring tool of the 5 degree or pitch class described, an adjustable tool guide mov- 5 In the oil fields there is used in various opable and adapted to be retained in any adjusted erations a device which includes a crank shaft, a position whereby the desired pitch or taper may crank, a crank pin, a pitman anda walking beam. e given the Opening being d- It has been found that the crank pin carrying the Other objects, as well as the advantages, con- 19 pitman works loose in the crank causing wear struction and operation of my invention will be in the crank pin hole and the pin itself, with a readily ppa nt by referenc o he f ll w n great loss of. efieiency in the operation of the specification in connection With the accompanystructure. ing drawings in which: i

a When such wear occurs it has been found Fi 1 is a longitudinal, vertical sectional view necessary to cease operations, take down the th u h my invention applied to a crank. 15 crank and usually the shaft which is integral F g. 2 is a top p V ew f the same With the with the crank. These parts, as well as the c ank in section. I crank pin must be taken to a shop where the Fig. 31s an enlarged end elevational View showpin hole may be enlarged and a new pin made ingthe star wheel for intermittently feedingv the to fit. Often the entire assembly is replaced 0 pp t along the uide- 20 with new parts, a very expensive procedure. Fig. 4 is a fragmentary side elevational view The weight of these parts is great, necessitating of a modified form of tool guide, which is aduse of a large crew of men and the use of justable folfthe desired taper 0f 17 winches and other equipment for dismantling Fig. 5 is a cross sectional view on the line 5-5 and transporting. Such equipment and the emof Fig. 1. e 25 ployment of a number of men as well as the Fig.6is an end elevationalview of the drive end length of time in which the rig is inoperative of the mechanism. are expensive items and have been a source of Fig. 7 is a fragmen a y Section and elevation much aggravation in the past. of the crank'and shaft, the pitin'an pin and pit- 0 To eliminate the above set out expensive proman of a rig mechanism as used in the oil field cedure I have devised a hole boring mechanism today. v r 1 which may be taken out to the rig, applied to Fig. 8 is an enlarged fragmentary View showthe crank and operated by an electric motor or ing the result of wear in the pin and the opening portable gas engine or other suitable power to in the crank.

rebore the hole, either straight or tapered. A Fig. 9 isan enlarged fragmentary view of a .3 new pin is then fitted to the crank and the pitcrank and pin wherein the opening in the crank man, and the rig is ready for operation. has been tape bo e by y device and thep n It has been found preferable to bore a tapered made to fit the tapered opening. hole and use a tapered pin since this method I Referring now to t dr w n s by numerals 0 of construction will be less subject to wear and of reference 1 designates a casing or housing in require little or no replacement. which the rotatable member or shaft 2 is suit- Therefore, the objects of my invention are, ably journaled in roller bearings 3, the ends of first; to provide a portable boring device to be the housing I carrying grease retainers 4 to preattached to the object in which the boring opvent surplus lubricant from flowing out of the eration is to be performed. housing. The filler opening 5, closed by plug 8 '45 Second; to provide a boring tool of the class is provided for the purpose of introducing lubridescribed adapted to employ interchangeable cant to the housing. taper bars whereby the proper taper desired may A retaining collar 7 is held in place by lock nut be given the opening being bored. 8, removalof which will allow the shaft 2 to Third; to provide a boring tool of the class debe removed from the housing. To the reduced 0 scribed wherein the cutting tool is slidably posiend 9 of the shaft 2 is keyed the gear l0, meshtioned on a tapered guide and intermittently proing with worm'l l, on shaft l2'supported in beargressive along the guide during rotative, moveings [3 carried by arms M of split collar l5 ment of said tool. adapted to be locked into position on the housing 56 Fourth; to provide a boring tool of the class I by suitable fastening means'lfi passing through ,55

angular extensions I! on said collar I 5. The shaft |2 may have extension l8 carrying pulley 9 and V belt which may be driven by any suitably secured to the end of the guide 2 The 12001 support or slide 24 is threadedly engaged to the screw 25 and is adapted to be moved along the dovetailed guide upon rotation ,of the screw, the slide 24 being threaded at only one end thereof as indicated at 25'. A slide spacer 21 is positioned-between the tool slide 24 and the dovetail 23 andset screws 28 threaded in the tool slide 24 press against the spacer 21 to hold the tool slide in adjusted sliding position.

The cutting tool 29 flts the square opening 30 in the tool support or slide 24, said tool resting against the tapered. end 3| ,of tool adjustment screw 32 whereby the vertical position of the tool may be changed to the exact amount of cut desired. The set screw 33 may be turned up against the tool to hold it stationary.

The end of the screw 25 carries a squared portion 34 adapted to receive a crank or handle 35 so that the screw 25 may be manually rotated to move the cutting tool and guide to starting or to any other desired position.

A star-wheel 35 is secured to the screw 25 and is intermittently rotatable by contact with the star-wheel, actuator 31 adjustably held in transverse support 38 secured to the plate 39. A thumb screw 40 or other suitable means may be provided for lockingthe actuator 31 in desired position. The plate 39 assists in holding the entire boring device in operating position on the object being bored, by use of the bolts 4| which pass through openings in plates 39 and flange 42 of housing Set screws 43 in the flange 42. are provided for steadying said flange on the crank. Reinforcement webs 44are provided between the flange 42 and the housing In Fig. '7 I have shown a fragmentary view of a crank shaft 45 andcrank46, and a pin 41 and pitman 48 .inoperating position. This structure is what is now being used in' the majority of rigs throughout the oil field industry. The straight pin 41 becomes worn and results in a loose fit and in wearing of the opening 48 in which it is positioned,as shown in the enlarged fragmentary View Fig. 8. After the use of my boring device a tapered hole is provided and a tapered pin 50 is used, providing a snug fit and elimination of undue wear.

The use and operation of my device is relatively simple. Prior to application of the boring tool, the pitman and pitman pin are removed. My device is applied tothe crank, the cutting tool being in starting position, that is, adjacent the end of shaft 2. The star-wheel 35 is removed prior to insertion of the shaft extension or guide 2| 'in the opening 5| and is then reaifixed to the screw 25. The bolts 4| draw the plate 39 and flange 42 into secure position on the crank, and the starwheel actuator! is adjusted and locked in proper position. x L I r p A.s a ledrivinsinea p o i e such as an electric motor, gasoline engine or other means, which may be connected through a V-belt 20 to the pulley l9 to drive worm and gear H and Ill, and shaft 2 with extension 2|. The star-wheel 36 will move in a path about the central axis of the shaft 2 and at every revolution one point of the star wheel will contact the actuator 31 and rotate the screw 25 slightly to advance the cutting tool for a fresh cut. The amount of movement of the tool can be changed by moving the actuator 31 up or down to vary the lengthof contact with the star wheel.

' As the cutting tool is slowly rotated it will advancealong the tapered guide by means of the star-wheel and screw, the taper of the resultant holebeing the same as the taper of the guide 2|. If a different taper is desired, a number of shafts 2 may be provided with different tapered extensions 2| and the extension with the proper taper is used in the device.

. I have provided a modification in my device whereby the taper of the boring tool guide may be changed without removing the entire guide. In Fig. 4 I have shown a fragment of the shaft 2 carrying an extension 2 and a guide 22 pivoted to the shaft 2 at 52 and adapted to be raised or lowered by means of the adjustment screw 53 threadedly engaging the extension 2 and rotatably secured to the guide 22. By these means the guide may be adjusted to any desired taper in a simple, eflicient and expeditious manner.

From the foregoing it will be apparent that I have provided a relatively simple boring device, portable in construction and eflicient in operation, use of which will eliminate the necessity of dismantling worn equipment and removing same toshops provided with special machinery for alterations and. repairs. Much time and money will be saved'by use of my invention and the repaired and replaced parts will provide a better and longer lasting construction than heretofore used,

It is obvious that changes in form, proportion and details of construction may be resorted to without departing from the spirit of myinvention, and therefore'I reserve all rights to any changes which come. within the scope of these ispecifications and the following claims.

What I claim asnew and desire to secure by Letters Patent is: 1. In a boring deviceof the class described for cranks, a support comprising a housing, a

transverse'flange at one .end of said housing,

means for affixing said flange to the crank, a

shaft rotatably carried in said housing, means on the end of the shaft remote from the flange for rotating said shaft, a tapered extension on the other end of the shaft projecting beyond ithe housing, a cutting means slidably carried by said tapered extension, automatic means for moving the cutting means along the tapered extension during rotation of the shaft.

2. In a boring device of the class described for cranks having a plurality of openings therein,

a support comprising a housing, a transverse fiange on said housing, means including one or more of the openings in the crank for securing the flange'to the crank to taper bore another of the openings in the crank, a shaft rotatably carried in said housing, means on the end of the shaft'remote from the flange for rotating said shaft, a tapered extension on the other end of the shaft projecting beyond the housing, a cutting means slidably carried by said tapered esisesie mutemetie s e IQrmQ t P ting means along the tapered extension during rotation of the shaft.

3. In a boring device of the class described for v end of the shaft projecting beyond the housing, the outside diameter of said extension being not more than the outside diameter of the shaft, a cutting means slidably carried by said tapered extension, and automatic means for moving the 5 cutting means along the tapered extension during rotation of the shaft.

DILWARD T. BEARDS'LEY. 

